I was told by the ticket office (middayish) even if people had 3500 pts, they could not buy any more tickets. Cant vouch if this true or not.
It's not as to how many tickets they can buy, as they're still limited to 1 per 'Fan Number'. The issue is whether people with 250pts or 1000pts had wrongly been credited with 3500pts, they could (and still can?) buy tickets online as they more than meet the 1250pts criteria. Giraffe's comments above seem to suggest they can - though it's not entirely clear if they were able to do this after the midday 'fix' or what their original loyalty point total was.